higher-order derivatives;  Original function;  structural features;  Unity

By analyzing the derivatives of a class of complex functions and their own structural characteristics, the first derivative of the class of functions and their own structural characteristics are obtained, and the original function of the class of functions and its higher-order derivatives can be quickly and accurately inferred without any analysis operation. The results show that the inverse operation of the higher-order derivative and the original function can be unified in this class of functions. The use of this result can bring a lot of simplification and convenience to the actual operation.